Returns the entity view display associated with a bundle and view mode.

Use this function when assigning suggested display options for a component
in a given view mode. Note that they will only be actually used at render
time if the view mode itself is configured to use dedicated display settings
for the bundle; if not, the 'default' display is used instead.

The function reads the entity view display from the current configuration, or
returns a ready-to-use empty one if configuration entry exists yet for this
bundle and view mode. This streamlines manipulation of display objects by
always returning a consistent object that reflects the current state of the
configuration.

Example usage:

Set the 'body' field to be displayed and the 'field_image' field to be
hidden on article nodes in the 'default' display.